ACRO bug (fixed in 2.9.1b): while doing flips in ACRO mode, if you switch to Stabilize while inverted your throttle will go to minimum. To regain throttle control you need to switch back to ACRO then back to Stabilize again (i.e. switch to stabilize twice). You never lose control of roll/pitch/yaw.
Loiter/AltHold/Auto/RTL bug: if you switch into these modes with throttle at zero motors will go to minimum until you raise the throttle.
Auto mode altitude bug (fixed in 2.9.1b): setting a waypoint altitude greater than 320m over home altitude may wrap around and instead be interpreted as a low altitude.
ArduCopter 2.9 is now in the mission planner and the downloads area!
The major improvement is we use inertial navigation to improve altitude hold. This increased reliance on the accelerometers means you must do some additional set-up before flying:
3. If upgrading from 2.8.1, modify the throttle and altitude PID values:
Here is the list of major changes (a more detailed list can be found in the release notes):
As per usual PIDs are optimised for the 3DR/jDrones quad with 850 motors and 10" props. If you're using more powerful motors/props and are seeing bad flight behaviour in stabilize, start by turning down Rate Roll P in 25% steps.
Special thanks to our testing team lead Marco and the dedicated bunch on the 2.8.1 release thread who put their copters at risk while testing the pre-release version. Some of their videos are here: 1 2 3 4 5 6 7 8
Please feel free to report issues you find in the discussion below and/or add them to the issues list.
One thing first.
For the first time my header and compass heading are correct. b4 I always had 30-90 degree (not minus in front, it means to the right) mismatch.
Although i can't figure out what fixes actually did this, please help me on this so I can get the right understanding of it.
This is looking promising!
Thanks to ALL of you. Randy is for sure the front figure and the one everybody can see are dedicating A LOT of work in this project. I believe there are other guys working pretty hard as well.
Got my 2nd 2.5 board today and look forward to more consisting work and diagnose in the near future :)
Thank you very much Marco. Say I wanted 70*, besides adding those defines, do I also have to increase stab_P to 7 as well?
My quad hovers below mid stick so would I increase THR_MID parameter or decrease it? I'm thinking I would increase it to bring my hover to the point when my throttle stick is in the middle.
Hi, I installed 2.9.1 today on 2 different multicopters both with apm2.5's. On one I had a small problem. After flashing, I erase the eeprom. I went to cal the radio while still hooked to the usb. I never could get the rdio (green bars) to respond so I could not calibrate. I had restart the MP, and rebooted the apm several times. I even reboot the PC. It never did work, the bars would flash green for a second then go gray. I was able to cal everything with a lipo hooked up through the 3dr radio telm, but not through the usb. I never tried with the lipo and usb.
The first quad I updated to 2.9.1 had no problem, well now that I am thinking, I am not sure if I tried to cal the TX using the usb but I think I did. the quad I had not seen any problem with has a frsky rx and futaba radio. the quad that had the problem uses a dragon link rx and the radio is a x9 flashed with 3rd party firmware.
Everything is good for me now but I thought I would report what I saw.
Dam im window's 7,your's,Marty
i would say RCTimer....
px4 must be APM3,how else would u update APM2.5....
No, sorry for confusion, I'll clarify it in the Wiki,
It means throttle stick down but centered right to left and other stick centered both directions.
Springs in the sticks actually bring them to the center except for the throttle which is down.
It probably wouldn't hurt to leave your 3 position mode switch in the center after moving it up and down as well.
At this point the Wiki is a bit out of date in many ways, but the team is moving it to WordPress and updating it and when I get my hands on the new improved copy I will try to keep it fixed up.